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Q.

Number of electrons present in 4f orbital of Ho+3 ion is ______.

(given atomic number of Ho=67 )

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answer is 10.

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Detailed Solution

  • The atomic number of Ho is known to be 67, so its electronic configuration will be written as Xe4f116s2.
  • The ion given in the question is Ho+3, so it is the ion of Ho with +3 electron charge, that is, its three outermost electrons are removed from their respective orbitals. So the electronic configuration of Ho+3 would be Xe4f10.
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